If you did not heed our warning from six months ago and are still using KMail < 1.0.29.1 (from KDE 1.x), you are advised to please upgrade to KDE 2.2 (or KDE 2.1.x) immediately. In about a week the bizarre KMail 1,000,000,000th second bug will strike, which can cause corruption of your mail folders. Details about the bug are available here.

The KMail developers recommend that users update to KDE 2.2, which includes a newer KMail with many other bugs fixed and many new features. According to KMail developer Daniel Naber,

The new version of KMail will use old mail files without problems.
However, once the new version is installed one should not switch back to
the old version because of changes in the index files and configuration
file. Just to be sure, we recommend that users make a backup of their mail
folder (~/Mail) and compress all folders before switching to the new
version.

Comments

What about those who don't want/can't run KDE 2.x?
Older computers for example. KDE 1.x runs very fast on my Pentium 166 with 48 MB RAM, but KDE 2.x is slow as /sbin/f*sck.ext2
Will there be a fixed version of KMail 1.x?

This is unbelievably stupid...users of RHL 6.2 cannot upgrade to Kmail 2.2
without a vast swathe of other incompatibilites intruding. Embedding 1.3 in
2.2 without providing an upgrade path was not a good idea.
///Peter
--
# rpm -Uiv kmail-2.1.1-1.i386.rpm
error: failed dependencies:
libDCOP.so.1 is needed by kmail-2.1.1-1
libkab.so.3 is needed by kmail-2.1.1-1
libkdecore.so.3 is needed by kmail-2.1.1-1
libkdefakes.so.3 is needed by kmail-2.1.1-1
libkdesu.so.1 is needed by kmail-2.1.1-1
libkdeui.so.3 is needed by kmail-2.1.1-1
libkfile.so.3 is needed by kmail-2.1.1-1
libkhtml.so.3 is needed by kmail-2.1.1-1
libkio.so.3 is needed by kmail-2.1.1-1
libkjava.so.1 is needed by kmail-2.1.1-1
libkparts.so.1 is needed by kmail-2.1.1-1
libkspell.so.3 is needed by kmail-2.1.1-1
libkssl.so.2 is needed by kmail-2.1.1-1
libksycoca.so.3 is needed by kmail-2.1.1-1
libmimelib.so.2 is needed by kmail-2.1.1-1
libmng.so.0 is needed by kmail-2.1.1-1 #

Check your KMAIL configuration.
Open KMAIL. Click on Settings- Network.On the "Sending Mail" tab, choose the "SendMail" option to bring up the Location:/usr/sbin/sendmail.Click
Click on Apply- OK and you're done.
I had the same problem and the above solved it.

We are trying to use or scanner for e-mail and faxs,also we are trying to use incrediMail and can't send our e-mail.We some how are using Outlook Express for our yahoo mail.If you can help us we'd appreciate it.Terry & Cheryl Cunningham

That should fix the problem. It was driving me nuts too and everyone kept telling me to make sure I had "allow authentication" checked. OH MAKE SURE YOU DO!!!! Thats necessary too! Theres also an "allow authentication" under the "sending mail" icon in the left panel. Make sure it's checked too. Good luck!

Problem occurs when using outlook express. Default email provider is Incredimail. My wife appreciates the whistles and bells Incredimail provides. This has been a real pain and thanks to you I can finally put this one to bed. Don't mean to get long winded, just one more thing I'll share with you. While using Microsoft Outlook and Incredimail I use pop.sbcglobal.com incoming and smtl.sbcglobal.yahoo.com outgoing. Many thanks Jim.

Thank goodness for this finding!! I'm still using Eudora 4.3 and was thinking of having to upgrade to 5.1 minimum. After calling SBC-DSL support, which dind't tell me anything more than what's already in their helpfiles, I googled the authentication feature hoping to find a Eudora version requirement. Using MAIL.SBCGLOBAL.NET solved my problem instantly!

Thanks so much - this worked!!!! I have two accounts coming into my Outlook, one from my online school, and the other this SBC one. Since we switched to our new provider I had to reconfigure outlook, the directions in the manual didn't work. I could only post to classroom stuff, but no email. It's been making me crazy.

THANKS SOOO MUCH... I have been working on this for over an hour.I got the error message, which took me to this site, and everything was fixed instantly.. what a great tip...
I really appreciate your sending that response to the poster...

Thanks for taking the time to post. My Eudora was working perfectly until several days ago and then it would not send. I called AT&T and they gave me useless information and then transferred me to their "pay" for support department. The bottom line, is when I changed SMPT.SBCGLOBAL.NET TO MAIL.SBCGLOBAL.NET, as per you directions, all is well.. Thanks, Thanks, Thanksazbud17@aol.com

I DO NOT UNDERSTAND WHY I AM UNABLE TO SEND AN ADDRESS CHANGE TO MY STATE AGENCY THAT CONTROLS MY LICENSE TO PRACTICE. I WOULD THINK IT WOULD BE A SIMPLE THING BUT I HAVE LEARNED IT IS NOT. WHAT DO I NEED TO DO? THANKS